New CloudFormation features fail to deploy because cfn_nag is not longer maintained

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Describe the bug

cfn_nag is no longer maintained (last update over two years ago) and is missing support for recent CloudFormation features such as Fn::ForEach:

• CFN nag error when running it on a template that contains intrinsic function Fn::ForEach stelligent/cfn_nag#621

It's not possible to work around this using the usual rule suppression mechanisms because cfn_nag itself is failing.

I would propose either removing cfn_nag or adding a parameter to disable it in the CfCT CloudFormation template.

To Reproduce
Use CloudFormation features released in the last two years such as Fn::ForEach

Expected behavior
CfCT should support all modern CloudFormation features.

Please complete the following information about the solution:

• Version: 2.7.1
• Region: all
• Was the solution modified from the version published on this repository? No

Additional context

Related issue: #119

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Another related issue: #115